Function Ozone is the only major atmospheric constituent that absorbs UV, whose concentration is maximum at stratosphere The ozone layer prevents most harmful UVB wavelengths of ultraviolet light UV light from passing through the Earth's atmosphere Without it life would have remained underwater It formed once photosynthetic marine organisms cyanobacteria began "polluting" the atmosphere with oxygen. Layers Of Atmosphere Ionosphere Aurora km Mesosphere 90 km Ozone Layer 50 km Stratosphere Tropopause 18 km 14 km Troposphere Earth Causes of Ozone depletion The main cause of ozone depletion and the ozone hole is manufactured chemicals manufactured halocarbon refrigerants, solvents, propellants and foam-blowing agents chlorofluorocarbons CFCsHCFCs, halonsreferred to as ozone-depleting substances ODS CFCs CFCs are chlorofluorocarbons; they are small molecules that contain chlorine, fluorine and carbon atoms.
List of the seven continents and the 5 oceans of the world. It is also one of the prime reasons which are leading to global warming. Ozone is a colourless gas which is found in the stratosphere of our upper atmosphere.
The layer of ozone gas is what which protects us from the harmful ultraviolet radiations of the sun. Thanks to the ozone layer which protects us from these harmful rays. From the s the depletion of the ozone layer started to capture the attention of the scientists, environmentalists, and the world community at large.
There had been a lot of research on this topic over these years to find out all the possible causes that lead to this problem and the effects of ozone depletion.
There has been also a lot of research to find out possible solutions to this problem. Let us see some of the important causes and effects of ozone layer depletion Causes of ozone layer depletion The main things that lead to destruction of the ozone gas in the ozone layer.
Low temperatures, increase in the level of chlorine and bromine gases in the upper stratosphere are some of the reasons that leads to ozone layer depletion.
But the one and the most important reason for ozone layer depletion is the production and emission of chlorofluorocarbons CFCs. This is what which leads to almost 80 percent of the total ozone layer depletion.
There are many other substances that lead to ozone layer depletion such as hydro chlorofluorocarbons HCFCs and volatile organic compounds VOCs. Such substances are found in vehicular emissions, by-products of industrial processes, aerosols and refrigerants.
All these ozone depleting substances remain stable in the lower atmospheric region, but as they reach the stratosphere, they get exposed to the ultra violet rays. This leads to their breakdown and releasing of free chlorine atoms which reacts with the ozone gas, thus leading to the depletion of the ozone layer.
Let us see its major impacts on human beings Skin Cancer: Malignant melanoma, basal and squamous cell carcinoma are the most common cancers caused by exposure to UV rays. UV rays are harmful for our eyes too.
Direct exposure to UV rays can lead to Cataract problems, and also Photokeratitis or snow blindness. Damage to Immune system: Increased exposure to UV rays can lead to weakening of the response of immune system and even impairment of the immune system in extreme cases.
This will result in you looking older than what you actually are. It can also lead to photo allergy that result in outbreak of rashes in fair skinned people In humans, exposure to UV rays can also lead to difficulty in breathing, chest pain, and throat irritation and can even lead to hampering of lung function.
UV rays affect other life forms too. It adversely affects the different species of amphibians and is one of the prime reasons for the declining numbers of the amphibian species. It affects them in every stage of their life cycle; from hampering the growth and development in the larvae stage, deformities and decreases immunities in some species and to even retinal damage and blindness in some species.
UV rays also have adverse effect on the marine ecosystem. It adversely affects the planktons which plays a vital role in the food chain and oceanic carbon cycle.
Affecting phytoplankton will in turn affect the whole ocean ecosystem.Ozone depletion describes two related events observed since the late s: a steady lowering of about four percent in the total amount of ozone in Earth's atmosphere (the ozone layer), and a much larger springtime decrease in stratospheric ozone around Earth's polar regions.
The latter phenomenon is referred to as the ozone hole. The ozone depletion potential (ODP) of a chemical compound is the relative amount of degradation to the ozone layer it can cause, with trichlorofluoromethane (R or CFC) being fixed at an ODP of The ozone layer is responsible for absorbing harmful ultraviolet rays, and preventing them from entering the Earth's atmosphere.
However, various factors have led to the depletion and damage of this protective layer. Learn more about the process, causes, and effects of ozone layer depletion. The emission of ozone depleting substances has been damaging the ozone layer.
But through domestic and international action, the ozone layer is healing and should fully recover by about This website addresses stratospheric ozone issues, including the science of ozone depletion, EPA's regulatory approach to protecting the ozone layer, .
Ozone is a triatomic form of oxygen (O 3), found in the Earth's atmosphere. A combination of low temperatures, elevated chlorine, and bromine concentrations in the upper stratosphere are responsible for the destruction of ozone.
The production and emission of chlorofluorocarbons (CFCs), is the leading cause of ozone layer depletion. Ozone layer depletion leads to decrease in ozone in the stratosphere and increase in ozone present in the lower atmosphere.
Presence of ozone in the lower atmosphere is .